Choke-coil mounting.



E. H. JACOBS.

CHOKE COIL MOUNTING.

' APPLICATION FILED APR.29, 1918. 1 ,274, 555 Patented Aug. 6, 1918.

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APPLICATION FILED AP 1918. 1,274,555. v Patented Aug. 6, 19m

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UNITED STATES PATENT OFFICE.

ERNEST I-I. JACOBS, OF CHICAGO, ILLINOIS, ASSIGNOR TO ELECTRICAL ENGINEERS EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOI$.

CHOKE-COIL MOUNTING.

Specification of Letters Patent.

Patented Aug. 6, 1918.

Application filed. April 29, 1918. Serial No. 231,549.

To all whom it may concern:

Be it known that I, ERNEST I-I. JACOBS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Choke-Coil Mountings,

of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part-of this specification.

The present invention relates to choke coils and more particularly to a mounting ance for normal frequency. a F or disturbances on=the line such as are caused by lightmng or surges whlch produce alternationsof current'fiow of "a very high frequency or of a steep wave front, the choke coil presents a very large reactance which hinders the passage of such disturbance through the same. A lightning arrester is usually employed in connection with the choke coil to relieve the'disturbance.

Choke coilsare usually made of bare wire wound into an'open' helm and supported at their ends. Dueto the necessity of preventing contact between turns,.due to the force developed tending to movethe turns and due i to the lack of rigidity,as well as lack of tensile 'strengtln'ithas been a very awkward matter to'mount a choke coil in any acceptable manner.

My invention aims'to overcome the difficulty heretofore experienced in mounting choke coils.

More-specific objects of my invention are:

To provide an adjustable choke coil mounting adapted to receive coils of different lengths, whereby the inductance unit may bereadily varied;

To provide a universal and interchangeable arrangement of parts whereby the insulation of the coil mounting may be increased or decreased as desired; and

To pI'OVldB a choke coil mounting adaptable to indoor or outdoor service and which will be'simple, compact, rugged and inexpensive to manufacture;

of the proved fittings in combination with universal insulators and adjustable supporting means therefor, all cooperatingto produce a choke coil mounting having the above characteristics. To the end of making the choke coils readily interchangeable, I have provided novel brackets for supporting the same which have an adjustable clamping feature capable of clamping to coils of different gage wire. To the end of making the insulating capacity of the mounting adjustable I have employed universal insulators and universal clamps for attachment thereto, these insulators being readily interchangeable to facilitate substitution of longer or shorter insulators.

The present fittings and insulators are standardized and are interchangeable with the fittings and insulators described in my copending application, Serial No. 231,548 filed on April 29, 1918.

A flexibility of assemblage is obtained through the use of the universal fittings and clamps, which is advantageous for adapting the mounting to an upright, inverted or vertical position.

In the accompanying drawings in which I have illustrated one preferred embodiment of my invention Figure 1 is a plan view of the choke coil and mounting;

Fig. 2 is a side elevation of the same; Fig. 3 is a detail elevation of the choke coil bracket;

Fig. 4 is a side elevation of the same; and

Fig. 5 is an enlarged fragmentary elevation of one of the clamping arms of the bracket. A supporting structure for the insulators and coil is formed by the two parallel pipes 77 which may be independent or comprise part of a frame structure for supporting a plurality of electrical fittings. Two plates 88 rest upon the pipes 7 and have integral guiding fingers 9-9 extending laterally from the plates and partly embracing the peripheries of the pipes 7. Both plates are identical and support identical insulator units.

Confining the description to the left hand insulator unit, a pair of clamping yokes 11-11 extend transversely of the pipes' 7 at each end of the plate 8 and are slung from the plate 8 by bolts I212. These bolts pass through bosses 14 on the yokes 11 and 7 formed with a reinforcing rib 16.

The insulator 17 has circumferential beads of substantially the same diameter formed in its upper and lower ends. Insulator clamps 18 and 19 engage over these beads, respectively. The insulator 17 is of the petticoat type and is intended for either indoor or outdoor service.

. Each of the clamps 18 and 19 is split into two semi-circular bands which are normally held in clamped engagement with the insulator beads by short bolts 24, passing 20 through the ears, on the ends of the clamps. Two feet 26 project downwardly 7 and radially from each semi-circular band of .the lowerclamp 19 and are bolted by bolts 7 27 to the baseplate 8. The lower clamp 19 is thus connected at four points to the base ,.plate:'8. I also contemplate cementing a pin of unique form in the lower. end of the insulator and releasably attaching it to the clamp 19 to prevent turning or tilting of the insulator; This pin and the particular construction'of the lower clamp 19 are shown and described in the latter of the previously mentioned applications;

The upper clamp 18 is provided with an annular socket plate 31, formed integral with the rear clamping band. The front band has a narrow strip of metal 32 joining the upper and lower parts of the band and this strip has acrowfoot formation engaging over a wedge shaped projection on the rim of the socket plate31 to hold the same to the insulator. The clamp 18 and socket 31 are designed to be universally adaptable to different insulators and'to receive interchangeably difierent fittings, as shown and described in the patent application of Frank The base 36 of the choke coil bracket 37 is bolted to the plate 31 by the bolts 38.

Referring now to the detail views of the bracket, an upright 39 rises perpendicularly from the base 36 and branches old, at

a point axially of the choke coil 41, into two diverging arms 42 and 43. A wide rib 39' is cast integral with the base 36 and upright 39 to reinforce the latter. arms 42 and '43 are strengthened by ribs '42 and 43,.which extend out to the end hub portions 45 and 46. Each of these hub portions is provided with an angular depression 47 designed to coiiperate with the removable clip 48 for clamping the choke coil wire therebetween. The circular depression intheclipl48 and the angular depression The diverging 47 are curved concentrically withthe curvature of the choke coils as shown in dotted lines in Fig. 3. The angular recess 47 secures effective claniping engagement with different gage wires. A screw '51 passes through each clip 48 and a boss 52, cast in the rib 42; and threads into a nut 53.

Adjacent the base 36 the flaring web 54 is set back from the upright 39 toafford access to the angular depression 47. The screw bolt 51 threads into a boss 52 cast in the rib 39. 1 r

The end turn of the choke coil 41 is first clamped in the lower depression 47. For this operation the bracket is preferably free so that it may be tilted back to afford access to the screw head 51. The remainder of the end turn is then insertedand clamped under the other clips 48 by drawing upon 7 the nuts 53.

The ends 55 of the .coil are turned out for connection to the line.

As. shown in Fig. 2, spacing sticks 61 may be employed to prevent possible contact between adjacent turns and to add to the rigidity of the coil. The sticks 61 form v a non-yieldable connection between the two brackets 37, whereby line wire strains imparted to one end of the coilare transmitted through the coil and are borne by both brackets and by the line wire on the other 41 can be variedby shifting one or both of the insulator units, and furthermore, longer 7 Screws 63 secure the or shorter coils can thus be accommodated.

. The universal clamps 18 and 19 are adaptable to insulator of difi'erent lengths,

whereby the insulating capacity 7 of the mounting can be easily increasedby the sub- 7 stitution of insulators of greater capacity.

E. Getts, Serial No. 219,094, filed February .Obviously the mounting may occupy any position. For inverted position, the petticoat insulators 17 are inverted on the mountmg.

ticular details shown and described.

I claim: 1

1. In combination,a supporting member, a pair of insulator units on said supporting member, each ofsaid insulator units com- I do not intend to belimited to the parprising a base member shiftable along said supporting member, an insulator mounted on said base member, a bracket mounted on 7 brackete,

2. A bracket for supporting choke coils and the like comprising a base member, arms diverging from said base member, and releasable clip members attached to said arms and to said base member, said clip members adapted to clamp to the choke coil.

3. A bracket for supporting choke coils and the like having a plurality of clip members attached thereto, and means co6perating with said clip members for releasably clamping said members to the choke coil.

4. A bracket for supporting choke coils and the like comprising a plurality of diverging arms, said arms having recesses therein adapted to receive the end turn of the choke coil, and clip members cooperating With said recesses and adapted to clamp the choke coil Wire in said recesses.

5. A bracket for supporting choke coils and the like comprising a plurality of diverging arms, said arms having recesses therein adapted to receive the turn of the choke coil, removable clip members cooperating with said recesses and adapted to clamp the choke coil Wire in said recesses and screw means engaging said arms and operable to releasably clamp the clip mem bers to the choke coil.

(5. In combination, an insulator, a bracket for supporting choke coils and the like, said bracket being mounted on said insulator, diverging arms on said bracket, and clamping devices on said arms adapted to clamp to the choke coil at different points of its circumference.

7. In combination, a pair of brackets, diverging arms extending from each of said brackets, clamping means on said arms, coil attaching means adapted to hold a coil between said brackets, and spacing members adapted to engage with the ends of said choke coil between said diverging arms.

8. A bracket for supporting a choke coil or the like comprising a plurality of arms, and an attaching base common to the arms, said base being adapted to be mounted on an insulated support, said arms having means at their outer ends for holding the end turn of a choke coil.

In witness whereof, I hereunto subscribe my name this 26th day of April, A. D., 1918.

ERNEST H. JACOBS.

Copies of this patent may lie-obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

